Why Can an Infection in the Brain's Ventricles Usually Be

question 18

Multiple Choice

Why can an infection in the brain's ventricles usually be detected in spinal fluid obtained from the lower back (lumbar region) ?

• A) Cerebrospinal fluid (CSF) originates in the ventricles, but percolates over and around the brain and spinal cord.
• B) There is a high degree of vascularity that exists, allowing easy transfer of bacteria in the cerebrospinal fluid (CSF) and the blood.
• C) There is a set of lymph nodes specifically in place to drain the cerebrospinal fluid (CSF) from the ventricles. They are found in the lumbar region of the spinal column.
• D) This is an incorrect statement. Since the central nervous system (CNS) is a protected site due to the blood-brain barrier, there can never BE an infection in the ventricles.
• E) When ventricles are infected, the brain reacts by pumping the causative pathogens into the CFS so that they can be removed by the immune system.

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Definitions:

Fixed Overhead

Costs that do not change with the level of production or sales, including expenses such as rent, salaries, and insurance, which are incurred regardless of business activity levels.

Contribution Margin Ratio

The percentage of sales revenue that exceeds variable costs, indicating the portion contributing to fixed costs and profit.

Selling Price

The amount a customer pays to purchase a product or service from a business.

Operating Leverage

A measure of how revenue growth translates into growth in operating income, due to fixed costs in a company's structure.